Hoisting-drum.



H. F. HOWARD.

HOISTING DRUM.

APPLICATION FILED JUNE 20.1913. 1 %1 61 1 Patented July 3, 1917:

TTNTTED @TATtEfl ATENT @FFTQE HENRY FISCHER HOWARD, 0F CHATTANOQGA, TENNESSEE, ASSIGNOB, TO SOUTHERN VTELL WORKS COMPANY, OF BEAUMONT, T XAS, A GGRPOBATION OF TEXAS.

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Application filed June 20, 1913.

To all whom it may concern:

Be it known that I, HENRY F. HOWARD, a citizen of the United States, residing at Chattanooga, in the county of Hamilton and State of Tennessee, have invented certain new and useful Improvements in Hoisting- Drums; and I do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in hoisting drums or similar shaft driven parts.

Hoisting drums are ordinarily keyed on their shafts, and include as integral parts thereof laterally projecting annular flanges which coiiperate as drums or pulleys with certain instrumentalities of the machine. But the torsional stresses developed are heavy and militate against the permanence and efficiency of the connection between the drum body and the shaft, causing the connected key to become worn, or sheared with the result that it rapidly wears loose and works or falls from position; and the integral annular flanges which are provided at the sides of the drum body become so worn as to be useless for their purposes while the drum body is in good operative condition with the result that the drum as a whole, notwithstanding the good condition of the drum body, has to be discarded and a new one substituted.

The object of the present invention is to overcome these diiiiculties and the invention satisfies this object by virtue of a new and unitary organization of parts wherein the drum body is not only fast upon its shaft but permanently so, and is provided at its sides with replaceable side flanges at points where the greatest wear occurs and which serve also the purposes of band or brake pulleys or wheels.

An embodiment of the invention is illus trated in the accompanying drawings, wherein Figure 1 is a side elevation of a hoisting drum in which the features of the invention are incorporated;

Fig. 2 is central longitudinal sectional view of the organization as a whole, with parts broken away.

Specification of Letters Patent.

Patented July 3, 191?.

Serial No. 774,914.

Similar characters of reference designate corresponding parts in both of the figures. The holsting drum includes a drum body or center 1, preferably provided at its ends with reduced extensions or hubs 2, and with side flanges 55, the drum center, the hubs and the side flanges being preferably cast together. The drum is mounted upon a shaft 3 and the permanenceof the fast relation between the drum and said shaft is secured by casting the drum with the shaft. The shaft preferably is originally provided with a number of depressions 4i, and during the casting operation the metal of the hubs'2 flows into said depressions and thereby establishes a homogeneous or integral connection of said hubs and said shaft.

in the embodiment shown the drum body or center 1 is also provided at its ends with circumscribing flanges 5 which provide for the attachment of the side cheeks 6. As previously explained these side cheeks take the place of the integral annular side flanges with which hoisting drums are usually provided but according to the present invention they are detachably associated with the drum body 1, preferably by means of fastening screws 7 which take into the flanges 5 and connect said flanges and the bodies or frame portions 8 of the cheeks. The bodies or frame portions of the cheeks are preferably formed with disk-shaped recesses or depressions 9 and the flanges 5 of the drum center fit into these recesses or depressions, flush with the inner side faces of the cheeks, the frame portions 8 encircling and fitting close to the hubs 2 below the juncture of the flanges 5 to the drum center 1 and thus tending to brace and strengthen the parts at such points. In this way the improved hoisting drum has the same external appearance and finish as a hoisting drum of ordinary construction and there are no projections or obstructions within the rope or cable channel, and when the cheeks become worn from friction of the cable therewith, the worn cheek may be removed and replaced with a new cheek and thus make the drum practically as efficient as a new drum. This also makes it possible to form thedrum center and its side flanges and limbs integral with the shaft by casting it on the shaft so that the possibility of separation of the two is guarded against; and also permits of a practical renewal of the drum by replacing worn out cheeks with. new ones, and thus the expense of entirely new drums is saved. The body or frame portions of the cheeks may serve as drive pulleys or friction band wheels.

Having fully described my invention I claim 1. A hoisting drum comprising a central body portion and side members, and a shaft entering and formed integral with the drum.

2. A hoisting drum comprising a central body portion and side flanges for attachment of check members, and a shaft entering and integral with the drum.

3. A hoisting drum provided with side hub extensions, and a shaft passing through the hub extensions and formed integral therewith.

4. A hoisting drum comprising a body portion and side flanges for attachment of cheek members and hub extensions formed integral with each other, and a shaft passing through the hub extensions and formed integral therewith.

5. A hoisting drum comprising a body portion and side flanges and a shaft formed integral with each other, and cheeks secured to the side flanges and having their inner faces substantially in alinement with the inner faces of said flanges.

6. In a hoisting drum organization, a shaft, a drum center, end hubs and side flanges formed integrally with one another, and frame portions provided with cheeks and having depressions to receive the side flanges of the drum center, said frame portions extending below the connection between the drum center and side flanges and terminating adjacent to the hubs.

In testimony whereof I affix by signature in presence of two witnesses.

HENRY FISCHER HOIVARD.

Witnesses GLENN H. MoNrFoR'r, C. A. YOUNG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0; 

